<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>箭头函数面试题</title>
</head>
<body>
<script type="text/javascript">
    var age = 100;
    var obj = {
        age: 20,
        say: () => {
            alert(this.age)
        }
    }

    obj.say();
</script>
</body>
</html>
